Copyright 2013 Scripps Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

TAHLEQUAH, Okla. - A Federal Grand Jury indicted a man Wednesday in the May bomb scare at a propane company that shut down US Highway 62 in Tahlequah.

Bryan Berres was arrested for possession of destructive devices and an unregistered firearm.

According to court documents, Berres walked up to Amerigas Propane Company in Tahlequah May 9, removed a backpack and asked for an ambulance. When paramedics arrived, Berres surrendered a knife and said he had a registered .38 in the bag, which investigators later said was false.

Paramedics believed Berres was delusional at the time, according to the affidavit, and an employee at the propane company described him as catatonic.

Police were called and when officers arrived they asked Berres about the bag's other contents, which he said included a "flash bang," leads, squibs and electric matches.

Before he was transported to a hospital, Berres told police federal agents had been to his home and questioned him about the Sandy Hook Elementary shooting in Newtown, Conn.

According to the affidavit of ATF Special Agent Ashley Stephens, Berres has been involved in the legal manufacturing of exploding targets, known as Tannerite, and has previously been in contact with various law enforcement agencies. Each time he was found in compliance.

Tahlequah police called the Bureau of Alcohol, Tobacco, Firearms and Explosives and the Oklahoma Highway Patrol Bomb Squad, who were able to safely open the bag and seize its contents. Inside they found a flash bang, black powder, a cannon fuse, wires, a .38 semi-automatic pistol and various ammunition.

Later while Berres was hospitalized, investigators asked him what he planned doing with the bag, and Berres said, "I'm going into the woods on 82 to get the government out of my body," according to Stephens' affidavit.

Berres was released from jail June 6 if he would seek medical or psychiatric treatment and participate in home detention.

Copyright 2013 Scripps Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.